Method for producing a very thin dense membrane

Details Method for producing a very thin dense membrane Method for producing a very thin dense membrane

1984-07-26

1985-12-03

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

By casting on a liquid surface

55158, 2105002, B29D 702

Patent

active

045565309

ABSTRACT:
A very thin, dense membrane is produced by preparing a solution of a polymer and/or prepolymer and a substantially water insoluble surface active agent in an organic liquid, allowing the solution to spread spontaneously on the surface of a liquid support substantially consisting of a polar fluid and allowing the solution to desolvate and to react, if a prepolymer is present. The membrane so produced may be supported by a substrate comprising at least one porous layer.

REFERENCES:
patent: 3767737 (1973-10-01), Lundstrom
patent: 4132824 (1979-01-01), Kimura et al.
patent: 4155793 (1979-05-01), Salemme et al.
patent: 4192842 (1980-03-01), Kimura
patent: 4279855 (1981-07-01), Ward, III
patent: 4406673 (1983-09-01), Yamada et al.

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